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| 使用半自动定氮仪测定天然橡胶氮含量方法的优化 |
| Optimizing the Determination Method Nitrogen Content of NR by Semi-automatic Azotometer |
| Received:July 17, 2019 Revised:July 17, 2019 |
| DOI：10.12137/j.issn.2095-5448.2019.09.0530 |
| 中文关键词: 半自动定氮仪 天然橡胶 氮含量 |
| 英文关键词: semi-automatic azotometer NR nitrogen content |
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| 中文摘要: |
| 对使用半自动定氮仪测定天然橡胶氮含量的方法进行优化，试验方法1为0.5 g胶料＋3.25 g混合催化剂＋70 mL氢氧化钠溶液＋50 mL硼酸吸收；试验方法2为0.1～0.2 g胶料＋0.65 g混合催化剂＋20 mL氢氧化钠溶液＋20 mL硼酸吸收。结果表明，试验方法1和2测得的胶料氮含量基本一致，均可行；但与试验方法1相比，试验方法2具有用时短、效率高、成本低和安全可靠的优点。 |
| 英文摘要: |
| The determination method of nitrogen content of NR by semi-automatic azotometer was optimized.Test method 1 was 0.5 g rubber compound ＋ 3.25 g mixed catalyst ＋ 70 mL sodium hydroxide solution ＋ 50 mL boric acid absorption.Test method 2 was 0.1～0.2 g rubber compound ＋ 0.65 g mixed catalyst ＋ 20 mL sodium hydroxide solution ＋ 20 mL boric acid absorption.The results showed that the nitrogen contents measured by test method 1 and 2 were comparatively consistent，and the two motheds were both feasible，but compared with test method 1，test method 2 had the advantages of short time，high efficiency，low cost，safety and reliability. |
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